12 days into 12/12 and now problems?

I had very healthy plants up until I switched to 12/12 light. I am pretty sure it is normal for the bottom leaves to shrivel and fall off but some of the top leaves are starting to show signs of burning. I think. I have pics I hope someone can have an idea as to what is going on. I also switched my nuted to flower mix. I am using GH products (green, brown and pink) The colour in the pics aren't the greatest either but its the best I can do.

WELCOME to RIU! well the plants leaves are yes... going to fall off the plant its basically shedding or ready for a fresh start so it starts to die off its normal as for the heat on top... what are the temps?? have they increased at all? how close do u have the lights from the tops?? and yea a few more pics would be grand!! =) well happy grows!! till next time.!

Looks as though it's a bit toasty in there.

TVMASDL said:

Looks as though it's a bit toasty in there.

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The temp is between 79F and 82F . The humidity is usually between 45-60%. I am using a 400watt hps with a digital ballast. 110 cfm fan out and a 55 cfm fan bringing in outside fresh air . I use only aerated water room temp. The room is around 250 square feet and the light can be as close as 6-9 inches before i raise the light. (woops)
The plants are around 48inchs tall.


Some more pics
Sorry my camera is so bad. some of the leaves in the pic look yellow. More yellow than they really are.

Hmm, well if it's not temp then it's most likely a nute burn/ph problem.

Have you ph'ed your nute solution? And how often do you feed?

TVMASDL said:

Hmm, well if it's not temp then it's most likely a nute burn/ph problem.

Have you ph'ed your nute solution? And how often do you feed?

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I feed once a day. I will check my PH level today. Thanks for the response.

ottobus said:

I feed once a day. I will check my PH level today. Thanks for the response.

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I was having this same problem, and it went away when I flushed my plants with correctly pH'd water, and began pHing everything that I put into the plants. Also, once a day feeding seems pretty excessive. Once your pH is balanced out, I'd reduce how often you feed.

Snak said:

I was having this same problem, and it went away when I flushed my plants with correctly pH'd water, and began pHing everything that I put into the plants. Also, once a day feeding seems pretty excessive. Once your pH is balanced out, I'd reduce how often you feed.

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I have been feeding once a day cause the pots seem pretty light by 6 or 7 at night, and the leave start to droop. Do you think it would be ok to let them go for an extra day like that?

ottobus said:

I had very healthy plants up until I switched to 12/12 light. I am pretty sure it is normal for the bottom leaves to shrivel and fall off but some of the top leaves are starting to show signs of burning. I think. I have pics I hope someone can have an idea as to what is going on. I also switched my nuted to flower mix. I am using GH products (green, brown and pink) The colour in the pics aren't the greatest either but its the best I can do.

Click to expand...

cut all the bottom stuff off and lolipop your plant and it loooks like either nute burn or lock did you flush it before you switched? and start bending or lsting your plant so that light is ata nice distance and also so it can reach other stuff as well

thanks for all your help. I think there was some nute lock. I didnt flush enough before kicking. but now after flushing for a few days and lollipoping all is good

Your plants will droop in anticipation of the night time cycle as well. Plants sleep to.